Accounts & login账户与登录
Do I need to download a wallet or write down a seed phrase?需要下载钱包、抄助记词吗？
No. Your Passkey (Face ID / fingerprint / security key) IS your account — no password to invent, no seed phrase to back up. WebAuthn/P-256 credentials replace the things people lose.不用。你的 Passkey（Face ID / 指纹 / 安全密钥）就是你的账户 —— 不用编密码、不用抄助记词。WebAuthn/P-256 凭证取代了那些容易丢的东西。
What is the email for, then?那邮箱是干什么的？
Email is just a simple way to reach/notify you (a one-time code confirms it's you at sign-up). It is NOT your password and NOT your security — your Passkey is.邮箱只是一个简单的联系/通知方式（注册时用一次性验证码确认是你）。它不是你的密码，也不是你的安全凭证 —— Passkey 才是。
Privacy隐私
Is my face / fingerprint uploaded anywhere?我的脸部 / 指纹数据会被上传吗？
No. 'Passkey' uses WebAuthn: your biometric never leaves your device — it only unlocks a device-held credential locally. We never see or store your face or fingerprint. That's why we say 'Passkey', not 'face scan'.不会。Passkey 走 WebAuthn：你的生物特征永远不离开设备 —— 它只在本地解锁一个存在设备里的凭证。我们看不到、也不存储你的脸或指纹。所以我们说「Passkey」，而不是「刷脸上传」。
Who owns my data?我的数据归谁？
You (and your community). Cos72 is fully open-source and provider-portable — your data, identity and assets stay yours; no vendor lock-in.归你（和你的社区）。Cos72 完全开源、provider 可替换 —— 数据、身份、资产都归你，没有厂商锁定。
Security & recovery安全与恢复
I lost my phone — can I get my account back?手机丢了，账户还能找回吗？
Yes — social recovery. Guardians (2-of-3, including a default community guardian) can restore your account. The community guardian is only 1 of 3 — it can help, never harm.能 —— 社交恢复。守护人（2-of-3，含一个默认社区守护人）可以帮你找回账户。社区守护人只占 3 之 1 —— 只能帮你、不能害你。
What if my key is stolen?如果我的 key 被盗了呢？
Security is layered by amount: small transfers need only your Passkey; larger ones add a DVT co-signature; large ones also need a guardian. A monotonic daily cap limits one-day damage (raising it reverts on-chain). Big transfers simply can't go through without extra approval.安全按金额分层：小额只需 Passkey；更大加 DVT 协签；大额还要 guardian。叠加一道只能调低的每日限额（调高会在链上 revert），锁住单日损失。大额转账没有额外签名根本走不了。
Who can be my guardian?守护人可以是谁？
A passkey, an EOA wallet (e.g. MetaMask), a friend's account, or the community — flexible by design (2-of-3).可以是 passkey、EOA 钱包（如 MetaMask）、朋友的账户，或社区 —— 设计上灵活混搭（2-of-3）。
Gas & fees费用与 Gas
Do I need ETH to use it?需要 ETH 才能用吗？
No. SuperPaymaster sponsors gas, so you can transact with zero ETH in your wallet — the #1 newbie blocker, gone.不用。SuperPaymaster 代付 gas，所以钱包里 0 ETH 也能交易 —— 新手最大的拦路虎被搬走。
Community & points社区与积分
What are xPNTs and reputation SBTs?xPNTs 和声誉 SBT 是什么？
xPNTs are community points — an in-community contribution record (not transferable across communities). Reputation SBTs are non-transferable reputation that works across communities. Participate → earn → your honor travels with you.xPNTs 是社区积分 —— 社区内的贡献记录（不可跨社区）。声誉 SBT 是不可转让、跨社区通用的声誉。参与 → 累积 → 荣誉带得走。
Can the community control my account?社区能控制我的账户吗？
No. The community is only 1 of your 3 guardians — it can help recover, never move your funds alone.不能。社区只是你 3 个守护人之一 —— 只能协助恢复，无法单独动你的资产。
Can I run my own community / self-deploy?我能自己开社区 / 自部署吗？
Yes. Fully open-source: use the hosted version or self-deploy your own instance, with your own points, gas policy and reputation.可以。完全开源：用托管版，或自部署你自己的实例，用你自己的积分、Gas 策略和声誉体系。